Fuel additives

Abstract

PCT No. PCT/GB97/01469 Sec. 371 Date Dec. 28, 1998 Sec. 102(e) Date Dec. 28, 1998 PCT Filed May 30, 1997 PCT Pub. No. WO97/45507 PCT Pub. Date Dec. 4, 1997Compounds of formula (I) where R1 is a C10-C32 alkenyl group and R2 and R3 are -(-OCH2CH2-)nOH, -(-OCH2CHCH3-)nOH or -OCH2CHOHCH2OH in which n is an integer from 1 to 10 are lubricity and corrosion-prevention additives for fuels.

What is claimed is: 
     
       1. A method of increasing the lubricity of a middle distillate fuel, kerosine or heavy fuel oil fuel comprising adding to said fuel of a compound of formula (I) ##STR4## where R 1  is a C 10  -C 32  alkenyl group and R 2  and R 3  are --(--OCH 2  CH 2  --) n  OH, --(--OCH 2  CHCH 3  --) n  OH or --OCH 2  CHOHCH 2  OH in which n is 1 or 2. 
     
     
       2. A method of inhibiting corrosion on a metal surface exposed to a middle distillate fuel, kerosine or heavy fuel oil fuel, comprising adding to said fuel of a compound of formula (I) ##STR5## where R 1  is a C 10  -C 32  alkenyl group and R 2  and R 3  are --(--OCH 2  CH 2  --) n  OH, --(--OCH 2  CHCH 3  --) n  OH or --OCH 2  CHOHCH 2  OH in which n is 1 or 2. 
     
     
       3. A method according to claim 1 or 2 wherein said compound of formula (I) is present in a concentration of 5 to 5000 ppm by weight. 
     
     
       4. A method according to claim 3 wherein said compound is present in a concentration of 10 to 500 ppm by weight. 
     
     
       5. A method according to claim 4 wherein said compound is present in a concentration of 30 to 300 ppm by weight.